Grinding-machine



(ModeL) J. RENTZ.

GRINDING MACHINE. No. 282,225. Patented July 31. 1883.

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WITNESSES:

ATTORNEYS.

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- UNITED STATES PATENT OFFICE.

JOHN RENTZ, or QUINCY, ILLINOIS.

GRINDING- MACHINE.

SPEGIFICATION forming part of Letters Patent No. 282,225, dated July 31,1883.

- Application filed June 4,1883. (Model) I holder for thegrinding-wheel, and a clamp- IO holder for the support of a mower orreaper sickle to be ground, in combination with a footpower or otherdriving-gear, making a simple and efficient machine, whereby lightgrinding can be done to advantage with a small I stone or emery-wheel,and the wheel-arbor has a socket for insertinga boring or carving tool,which may also be worked by the same means, all as hereinafterfully'described.

Reference is to be had to the accompanying 2o drawing, forming part ofthis specification, in

which the figure is a perspective view of my improved grinding apparatusapplied to a footpower machine. I y

' The pulley at, having a bearing in the up- 2 5 right b, and beingdriven by a belt, 0, from a wheel, d, to which power may be applied by atreadle, e, or any other means, has a long flexible shaft, f, of coiledwire, attached to its shaft and extending back of the upright frame I)and returning through a guide and support, h, suspended from one end ofan adjustable bar, z, attached to the top of a bracket, j, which isoffset backward from the top of frame I) a suitable distance to allowthe grinding-wheel j to work on a mower or reaper sickle placed in theclamps k, to be held for grinding the cutters thereon. From the guide hthe flexible shaft f extends a suitable distance, and is connected atthe end with the 0 mandrel l of the wheel or stone j, which has abearing in the hub m of a bar, n,having a handle, 0, by which to holdthe stone or emerywheel to the work. The bar 1' is secured to the top ofbracket j by a clamp-screw, p, which passes through a slot of said bar,allowing the bar to shift lengthwise along the bracket, and also toswing up and down at the ends.

the other end of said 'bar a socket device, q, is suspended from it byan adjusting-screw, s, allowing it tobe turned on said bar '6, the'saidsocket device being to receive the bar n to hold the stone in anydesired fixed position, and there is also a socket, t, in the bracket j,for receiving said bar a, when it is desired to hold the stone in thatposition. For a seat to accommodate the operator, and as a means ofstaying the frame b in an upright position, a isa bench pivoted to theframe at w, and above it provided with a pin, 00, to retain it inposition when raised. To this bench are'pivoted the legs 0 o. By thisconstruction the bench and legs may be folded down flat against the mainframe for storage or transportation. 3 represents a drill orcarving-tool, attached to the spindle of the grinding-disk, to be used,when required, With or without the disk.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, in a grinding-machine, ofthedriving-pulley a, flexible shaft f, support h, connected by suitablemeans with the main frame I), the handle-bar n, and the stone oremery-wheel j, having its shaft or spindle bearing in hub m of said bara, substantially as described.

2. The combination, with the main frame I), of the adjustingsupporting-bar 'i and shaftsupport h, the flexible shaft f, thedrivingpulley a, and the handle-bar a, substantially as described. I I

3: The adjusting-bar i and adjusting-socket device q, in combinationwith the main frame 6, the flexible shaft f, driving-pulley a, and thehandle-bar n, substantially as described. 4. The combination, with themain frame I), flexible shaft f, drive-pulley a, and handle-bar n, ofthe adjusting-bari and adjustingsocket device 9, substantially as andfor the purpose specified. I

5. The bracket 3 having the socket t, in corn bination-with flexibleshaft f, hand-bar n, disk j, and the drivingpulley a, substantially asdescribed.

6. The combination of bench at o, frame I), foot-power driving-gear, andthe flexible shaft f, support 71, and the handle-bar a, substantially asdescribed.

JOHN RENTZ.

Witnesses:

GOTTLIEB RENTZ, GEO. O. S. BERT.

